I would give 8 for the story because it's not complicated plot but still interesting, meanwhile point of this story is how they (FL and ML) fall in love and get through ML problems. The only thing i learned from this drama is how billiard game is played. Chinese have done all the variety sports in their dramas.

ALL CAST, ALL OF THEM i would give 10.... because they all so exceptional handsome. But sometimes i get awkward feeling with ML acting not because the flirty scene, i think ML expression is just feel empty sometimes but he is handsome :) (He was forgiven)

Tbh i don't really get the story with first 3 episode (the reason why you had to watched this more than once), and get sulky with those flirty from ML because i envy with FL (don't mind me).

If you don't mind or searching for lovely poisonous sweet scene, I recommend you!!